Venus and Serena Williams in pictures: their outrageous tennis outfits through the years

Venus has promised more original dress designs for this year's Australian Open. "There'll be more illusion, and also skin... more skin this year," she said. The blue, figure-hugging dress with plunging neckline that she wore in the first round caused something of an optical illusion as she raced around the similarly-coloured court. The zipper kept lifting up at the front..